/*body {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    position: absolute;
    width: 100%;
    height: 100%;
    background: #18212E;
    margin: 0;
}

section {
  display: flex;
  flex-wrap: wrap;
  width: 22rem;
  height: 22rem;
}

div {
  width: 1.5rem;
  height: 1.5rem;
  background: #FFF;
}

.blue {
    width: 2rem;
    height: 2rem;
    margin: .5rem;
}

.green {
    width: 2rem;
    height: 2rem;
    margin: .5rem;
}*/

#demo1 {
    width: 0;
    height: 100px;
    background-color: orange;
}

#demo2 {
    width: 0;
    height: 100px;
    background-color: orange;
}